Chevrolet 30 Series 1967 Service Manual page 205

The Eaton 18,500 capacity two-speed axles, Models
17201 and 17221 are optionally available on all 60 Series
trucks.
Both models are equipped with a spiral bevel ring gear
and pinion. The two axles are sim ilar in construction,
the only difference being the drive gear diameter is
larger on the 17221 model.
An electric power shifting arrangement is used to as­
sist in making ratio changes. The driver selector control
is mounted on the shift lever. Refer to "Rear Axle (Chev­
rolet) Two-Speed E lectric Shift System" in this section
Maintenance and adjustments for the Eaton Two-Speed
axles are performed the same as those outlined for the
GENERAL DESCRIPTION
Fig . 90 - 18,500 Lb. Eaton Two-Speed
MAINTENANCE AND ADJUSTMENTS
REAR SUSPENSION AND DRIVE LINE 4-47
for description and maintenance information on electrical
system.
The Axle Shafts, Housing, Wheels and Hubs used on the
17201 and 17221 Model axles are the same as those out­
lined in 17,000 lb. Chevrolet Single-Speed.
An improved lubrication system (fig. 90) which has a
steel reinforced nitrite scraper mounted to the inside of
the carrier. This scraper is positioned to collect oil
from the surface of the rotating gear support case. Oil
is channeled to the right-hand differential bearing,
through the differential and planetary unit to the left-hand
differential bearing and back to the reservoir.
Chevrolet Single-Speed axle.
rolet) Single-Speed."
Refer to "Rear Axle (Chev-
CHEVROLET TRUCK SERVICE MANUAL